Tail gas purification process for submerged chain conveyor and device used by tail gas purification process

Abstract

The invention provides a slag conveyor tail gas purification process and a using device, tail gas of a slag conveyor enters a condensation liquid separation system through an inlet pipeline system under the pumping action of an induced draft fan system, moisture contained in the tail gas is cooled and separated, then the tail gas is sent to a purification system, and after toxic combustible gas is purified and detected to be qualified, the tail gas is discharged to be emptied through an induced draft fan. The tail gas purification device has the beneficial effects that the tail gas of the submerged chain conveyor can be purified, and the risk that operators are poisoned by the tail gas of the submerged chain conveyor is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal gasification, and in particular relates to a slag remover tail gas purification process and a use device. Background Art

[0002] Coal chemical industry is a process that uses coal as raw material, converts coal into gas, liquid and solid products or semi-products through chemical processing, and then further processes them into chemical and energy products. With the continuous reduction of world oil resources, coal chemical industry has broad prospects. Coal gasification is the most important unit in the development of coal chemical industry and is known as the leading technology of coal chemical industry. It uses air, oxygen, water vapor and other gasifying agents to carry out high-temperature gasification reaction in the gasifier, converting it into coal gas with different composition and calorific value, and then synthesizing liquid fuel and various chemical products.

[0003] In the combustion chamber at the top of the gasifier, coal reacts with oxygen and steam under high temperature and high pressure of 4.0-8.7MPaG and 1200-1400℃ to generate raw water gas. The raw water gas and molten slag leaving the combustion chamber are water-quenched in the lower quenching chamber of the gasifier, causing the molten slag to cool rapidly to form solid slag, which enters the lock bucket along with the slag discharged from the gasifier. The lock bucket is a set of intermediate equipment that realizes the intermittent change of the high-pressure gasification system and the low-pressure slag scavenging system through the continuous cycle of slag collection, pressure reduction, slag discharge, flushing and pressurization. Finally, the solid slag after decompression is discharged into the slag scavenger at normal pressure together with the black water. Multiple scrapers are set on the slag scavenger to lift the solid slag while draining some of the water, and discharge it at the top of the slag scavenger for belt conveyor or loading and transportation.

[0004] At present, the top cover and head of the slag bin of the traditional slag scoop machine are connected to the atmosphere. Some toxic gases dissolved in the black water under high pressure, such as carbon monoxide and hydrogen sulfide, will be released into the environment near the slag scoop machine after being decompressed to normal pressure during the slag discharge process and discharged into the slag scoop machine. Many projects have reported that the toxic and combustible gas alarm installed near the slag scoop machine sounds an alarm when the slag scoop machine is discharging slag. This situation not only pollutes the operating environment, but also has an adverse effect on the life and health of the operators, so the tail gas of the slag scoop machine needs to be purified. Summary of the invention

[0005] In view of this, the present invention aims to propose a slag collector exhaust gas purification process and a device for use, so as to solve at least one problem in the background technology, purify the slag collector exhaust gas, and reduce the risk of poisoning hazards to operators caused by the slag collector exhaust gas.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] The present invention provides a slag scraper tail gas purification process. Under the action of an induced draft fan, the tail gas of the slag scraper enters a condensation and liquid separation system through an inlet pipe system. The moisture contained in the tail gas is cooled and separated and then sent to a purification system. After the toxic and flammable gas is purified, it is tested by a detection system. After passing the test, it is discharged to a safe place on the top through an induced draft fan for discharge.

[0008] The purification system stores purifiers, which adsorb toxic and flammable gases and discharge them to a safe place on the top of the gasification device through an induced draft fan for discharge.

[0009] Furthermore, a plurality of air suction ports are evenly arranged on the water bin, slag bin, lifting section and head of the slag scoop machine.

[0010] The purification system stores purifiers, which absorb toxic and flammable gases and then discharge them to a safe place on the top of the gasification device through the induced draft fan for venting. Multiple equipment pipe openings are set in the water tank, slag tank, lifting section and head of the slag scoop machine. The equipment pipe openings are distributed as evenly as possible, and each branch pipeline is connected to the equipment pipe opening. The branch pipe openings are combined and sent to the condensation and liquid separation system.

[0011] Preferably, a plurality of air suction ports are evenly arranged every 2-3 meters on both sides of the water bin, slag bin, lifting section and head part of the slag remover.

[0012] Furthermore, a purifier is provided in the purification system, the purifier uses activated carbon or molecular sieve as a carrier and is loaded with a catalytic aid;

[0013] Preferably, the catalyst aid is an iron-based or zinc-based room-temperature fine desulfurizer;

[0014] The purifier uses activated carbon or molecular sieve as a carrier and is loaded with a special catalytic aid, which is a room temperature fine desulfurizer. The purifier has the advantages of large sulfur capacity, high desulfurization accuracy, high strength, and high air velocity. The principle of catalytic aid desulfurization is that H2S in the tail gas of the slag machine reacts with O2 in the tail gas and the active components in the catalyst to generate sulfur or sulfide, which is deposited in the gaps of the purifier. The reaction equation is as follows, where MO is the active component, usually an iron or zinc oxide. The purification system consists of two purification tanks, one in operation and one in standby, and the two are switched for use.

[0015]

[0016] H2S+MO=MS+H2O

[0017] Preferably, the particle size of the purifier is Bulk density 600±60kg / m 3 , pore volume ≥ 0.6ml / g, strength ≥ 90%, desulfurization accuracy H2S ≤ 0.03mg / Nm 3 .

[0018] The sulfur capacity of conventional activated carbon is about 8wt%, and the service life of conventional activated carbon is about 3 months. The modified activated carbon loaded with active components used in this application has a sulfur capacity of up to 16wt%, and the service life can be extended to about 6 months.

[0019] Further, the detection is performed in the outlet piping system, and the outlet piping system includes a toxic and combustible gas detector;

[0020] The purification system includes at least two purification tanks, and the induced draft fan includes at least two induced draft fans; when the toxic and combustible gas detector arranged at the vent port alarms, the life of the purifier expires, the shut-off valve at the inlet and the shut-off valve at the outlet of the first purification tank are switched to the second purification tank, and when the first induced draft fan fails, it is switched to the second induced draft fan.

[0021] The present application sets up two induced draft fans, one for operation and one for standby, which can be switched for use, so as to purify the exhaust gas of the slag collector and reduce the risk of poisoning hazards to the operators caused by the exhaust gas of the slag collector.

[0022] A device for using a slag scooping machine tail gas purification process, characterized by comprising an inlet pipeline system, a condensation and liquid separation system, a purification system, an induced draft fan system, and an outlet pipeline system;

[0023] The inlet pipeline system is arranged above the slag remover; the inlet pipeline system is connected with the condensation separation system, the condensation separation system is connected with the purification system, the purification system is connected with the induced draft fan system, and the induced draft fan system is connected with the outlet pipeline system.

[0024] Furthermore, the inlet pipe system includes an air intake pipe and a connecting pipe, and a plurality of air intake pipes are connected to the connecting pipe, and the air intake pipe and the connecting pipe are arranged vertically;

[0025] Several air suction ports are evenly arranged on the water tank, slag tank, lifting section and head of the slag scoop machine;

[0026] The suction pipe is connected correspondingly to the position of the suction port.

[0027] Multiple air suction ports are evenly arranged on both sides of the water bin, slag bin, lifting section and head of the slag remover, and the equipment pipe openings are distributed as evenly as possible so that exhaust gas from all parts of the slag remover can be sucked into the purification system.

[0028] Furthermore, the condensation and liquid separation system includes a condenser and a liquid separation tank;

[0029] The inlet pipeline system is connected to the condenser through a pipeline, the condenser is connected to one side of the liquid separation tank through a pipeline, and the bottom of the liquid separation tank is connected to the slag scooping machine through a condensing pipe;

[0030] The upper part of the separation tank is connected to the purification system through a pipeline.

[0031] The function of the condensation and liquid separation system is to condense the water vapor contained in the tail gas of the slag remover and separate the gas and liquid to prevent the water vapor from affecting the adsorption performance of the downstream purifier and extend the service life of the purifier.

[0032] The condensation and liquid separation system is equipped with a condenser and a liquid separation tank. The cold source is the circulating cooling water used in the gasification device. The tail gas is sent to the liquid separation tank after leaving the condenser. A swirl plate or a wire mesh demister is installed on the top of the liquid separation tank. After liquid separation, the tail gas is sent to the purification system, and the condensate returns to the slag remover.

[0033] Further, the purification system includes at least two groups of purification components, and each group of purification components is connected in parallel;

[0034] Preferably, each purification assembly includes a purification tank, a purification tank inlet cut-off valve, and a purification tank outlet cut-off valve; the purification tank inlet cut-off valve is connected to the condensate separation system through a pipeline; the purification tank outlet cut-off valve is connected to the induced draft fan system through a pipeline;

[0035] Preferably, the purification system comprises a first purification component and a second purification component, and the first purification component and the second purification component are connected in parallel through a pipeline;

[0036] The first purification assembly includes a first purification tank, a first purification tank inlet cut-off valve, and a first purification tank outlet cut-off valve;

[0037] The first purification tank inlet cut-off valve and the first purification tank outlet cut-off valve are arranged on both sides of the first purification tank through pipelines, and the first purification tank inlet cut-off valve is connected to the condensate separation system through pipelines; the first purification tank outlet cut-off valve is connected to the induced draft fan system through pipelines;

[0038] The second purification assembly includes a second purification tank, a second purification tank inlet cut-off valve, and a second purification tank outlet cut-off valve;

[0039] The second purification tank inlet shut-off valve and the second purification tank outlet shut-off valve are arranged on both sides of the second purification tank through pipelines. The second purification tank inlet shut-off valve is connected to the condensation separation system through pipelines; the second purification tank outlet shut-off valve is connected to the induced draft fan system through pipelines.

[0040] Further, the induced draft fan system includes at least two sets of induced draft fan assemblies;

[0041] Preferably, each group of induced draft fan components is connected in parallel;

[0042] Preferably, each set of induced draft fan components includes an induced draft fan inlet cut-off valve, an induced draft fan, and an induced draft fan outlet cut-off valve;

[0043] Preferably, the induced draft fan inlet cut-off valve and the induced draft fan outlet cut-off valve are arranged on both sides of the induced draft fan through pipelines;

[0044] Preferably, the induced draft fan system comprises a first induced draft fan assembly and a second induced draft fan assembly;

[0045] The first induced draft fan assembly and the second induced draft fan assembly are connected in parallel through a pipeline, and one end of the first induced draft fan assembly and the second induced draft fan assembly are connected to the outlet pipeline system through the pipeline;

[0046] The first induced draft fan assembly includes a first induced draft fan inlet cut-off valve, a first induced draft fan, and a first induced draft fan outlet cut-off valve;

[0047] The first induced draft fan inlet cut-off valve and the first induced draft fan outlet cut-off valve are arranged on both sides of the first induced draft fan through pipelines;

[0048] The second induced draft fan assembly includes a second induced draft fan inlet cut-off valve, a second induced draft fan, and a second induced draft fan outlet cut-off valve; the second induced draft fan inlet cut-off valve and the second induced draft fan outlet cut-off valve are arranged on both sides of the second induced draft fan through pipelines.

[0049] Furthermore, the outlet pipeline system includes an outlet pipe and a toxic and combustible gas detector. The outlet pipe is connected to the induced draft fan system, and the toxic and combustible gas detector is connected to one side of the outlet pipe.

[0050] The function of the outlet pipe system is to send the purified exhaust gas to a safe place at the top for discharge. The outlet branch pipes of the induced draft fan are gathered into a main pipe, and piped to a safe place at the top of the gasification device for discharge. A rain cap is installed at the discharge port, and a shower is installed at the low point of the pipe.

[0051] The toxic and combustible gas detector, the first purification tank inlet cut-off valve, the first purification tank outlet cut-off valve, the second purification tank inlet cut-off valve, the second purification tank outlet cut-off valve, the first induced draft fan inlet cut-off valve, the first induced draft fan outlet cut-off valve, the second induced draft fan inlet cut-off valve, and the second induced draft fan outlet cut-off valve are connected to the controller, and the controller adopts the existing PLC technology.

[0052] Compared with the prior art, the slag scoop machine tail gas purification process and use device described in the present invention have the following advantages:

[0053] In the exhaust gas purification process of the slag collector applied for, the function of the inlet pipeline system is to collect the toxic and flammable gases volatilized from various parts of the slag collector, and then they are processed by the condensation and liquid separation system and the purification system. After passing the test, they are discharged to the air through the induced draft fan, thereby reducing the risk of poisoning hazards to the operators caused by the exhaust gas of the slag collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0055] Figure 1It is a schematic diagram of a device for using a slag machine tail gas purification process according to an embodiment of the present invention.

[0056] Description of reference numerals:

[0057] 1. Slag scoop machine; 2. Condenser; 3. Liquid separator; 4. First purification tank; 5. Second purification tank; 6. First induced draft fan; 7. Second induced draft fan; 8. Toxic and flammable gas detector; 9. Second purification tank inlet shut-off valve; 10. First purification tank inlet shut-off valve; 11. Second purification tank outlet shut-off valve; 12. First purification tank outlet shut-off valve; 13. First induced draft fan inlet shut-off valve; 14. First induced draft fan outlet shut-off valve; 15. Second induced draft fan inlet shut-off valve; 16. Second induced draft fan outlet shut-off valve. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0059] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0060] Example 1

[0061] A device for using a tail gas purification process of a slag scooping machine 1 comprises an inlet piping system, a condensation and liquid separation system, a purification system, an induced draft fan system, and an outlet piping system; the inlet piping system is arranged above the slag scooping machine 1; the inlet piping system is connected to the condensation and liquid separation system, the condensation and liquid separation system is connected to the purification system, the purification system is connected to the induced draft fan system, and the induced draft fan system is connected to the outlet piping system.

[0062] Example 2

[0063] In this embodiment, based on the embodiment 1, the inlet pipe system includes an air suction pipe and a connecting pipe, and a plurality of air suction pipes are connected to the connecting pipe, and the air suction pipe and the connecting pipe are arranged vertically; a plurality of air suction ports are evenly arranged on the water bin, slag bin, lifting section, and head of the slag scooper 1; and the air suction pipe is connected to the positions of the air suction ports. A plurality of air suction ports are evenly arranged on both sides of the water bin, slag bin, lifting section, and head of the slag scooper every 2-3 meters.

[0064] The condensation and liquid separation system includes a condenser 2 and a liquid separation tank 3; the inlet pipeline system is connected to the condenser 2 through a pipeline, the condenser 2 is connected to one side of the liquid separation tank 3 through a pipeline, and the bottom of the liquid separation tank 3 is connected to the slag remover 1 through a condenser pipe; the upper part of the liquid separation tank 3 is connected to the purification system through a pipeline. The function of the condensation and liquid separation system is to condense the water vapor contained in the tail gas of the slag remover 1 and perform gas-liquid separation to prevent the water vapor from affecting the adsorption performance of the downstream purifier and extend the service life of the purifier. The condensation and liquid separation system is equipped with a condenser 2 and a liquid separation tank 3, and the cold source is the circulating cooling water used for the gasification device. After the tail gas leaves the condenser 2, it is sent to the liquid separation tank 3. A swirl plate or a wire mesh demister is set on the top of the liquid separation tank 3. After the liquid separation, the tail gas is sent to the purification system, and the condensate returns to the slag remover 1.

[0065] Example 3

[0066] In this embodiment, based on the embodiment 2, the detection is carried out in the outlet pipeline system, the outlet pipeline system includes a toxic and combustible gas detector 8; the purification system includes at least two purification tanks, and the induced draft fan includes at least two induced draft fans; when the toxic and combustible gas detector 8 arranged at the vent port alarms, the life of the purifier expires, the shut-off valve at the inlet of the first purification tank 4 and the shut-off valve at the outlet are switched to the second purification tank 5, and when the first induced draft fan 6 fails, it is switched to the second induced draft fan 7.

[0067] The purification system includes at least two groups of purification components, and each group of purification components is connected in parallel; preferably, each group of purification components includes a purification tank, a purification tank inlet shut-off valve, and a purification tank outlet shut-off valve; the purification tank inlet shut-off valve is connected to the condensation separation system through a pipeline; the purification tank outlet shut-off valve is connected to the induced draft fan system through a pipeline; preferably, the purification system includes a first purification component and a second purification component, and the first purification component and the second purification component are connected in parallel through a pipeline; the first purification component includes a first purification tank 4, a first purification tank inlet shut-off valve 10, and a first purification tank outlet shut-off valve 12; the first purification tank inlet shut-off valve 10, the first purification tank outlet shut-off valve 12 ... The tank outlet shut-off valve 12 is arranged on both sides of the first purification tank 4 through a pipeline, and the first purification tank inlet shut-off valve 10 is connected to the condensation liquid separation system through a pipeline; the first purification tank outlet shut-off valve 12 is connected to the induced draft fan system through a pipeline; the second purification component includes a second purification tank 5, a second purification tank inlet shut-off valve 9, and a second purification tank outlet shut-off valve 11; the second purification tank inlet shut-off valve 9 and the second purification tank outlet shut-off valve 11 are arranged on both sides of the second purification tank 5 through a pipeline, and the second purification tank inlet shut-off valve 9 is connected to the condensation liquid separation system through a pipeline; the second purification tank outlet shut-off valve 11 is connected to the induced draft fan system through a pipeline.

[0068] Example 4

[0069] In this embodiment, based on the embodiment 3, the induced draft fan system includes at least two groups of induced draft fan components;

[0070] Preferably, each group of induced draft fan components is connected in parallel;

[0071] Preferably, each set of induced draft fan components includes an induced draft fan inlet cut-off valve, an induced draft fan, and an induced draft fan outlet cut-off valve;

[0072] Preferably, the induced draft fan inlet cut-off valve and the induced draft fan outlet cut-off valve are arranged on both sides of the induced draft fan through pipelines;

[0073] Preferably, the induced draft fan system includes a first induced draft fan assembly and a second induced draft fan assembly; the first induced draft fan assembly and the second induced draft fan assembly are connected in parallel through a pipeline, and one end of the first induced draft fan assembly and the second induced draft fan assembly are connected to the outlet pipeline system through a pipeline; the first induced draft fan assembly includes a first induced draft fan inlet cut-off valve 13, a first induced draft fan 6, and a first induced draft fan outlet cut-off valve 14; the first induced draft fan inlet cut-off valve 13 and the first induced draft fan outlet cut-off valve 14 are arranged on both sides of the first induced draft fan 6 through a pipeline; the second induced draft fan assembly includes a second induced draft fan inlet cut-off valve 15, a second induced draft fan 7, and a second induced draft fan outlet cut-off valve 16; the second induced draft fan inlet cut-off valve 15 and the second induced draft fan outlet cut-off valve 16 are arranged on both sides of the second induced draft fan 7 through a pipeline.

[0074] The outlet pipe system includes an outlet pipe and a toxic and combustible gas detector 8. The outlet pipe is connected to the induced draft fan system, and the toxic and combustible gas detector 8 is connected to one side of the outlet pipe. The outlet pipe system is used to send the purified tail gas to a safe place at the top of the gasification device for venting. The outlet branch pipes of the induced draft fan are collected into a main pipe and piped to a safe place at the top of the gasification device for venting. A rain cap is set at the venting port, and a shower is set at the low point of the pipe.

[0075] The toxic and combustible gas detector 8, the first purification tank inlet cut-off valve 10, the first purification tank outlet cut-off valve 11, the second purification tank inlet cut-off valve 9, the second purification tank inlet cut-off valve 9, the first induced draft fan inlet cut-off valve 13, the first induced draft fan outlet cut-off valve 14, the second induced draft fan inlet cut-off valve 15, and the second induced draft fan outlet cut-off valve 16 are connected to the controller, and the controller adopts the existing PLC technology.

[0076] Example 5

[0077] This embodiment provides a tail gas purification process for a slag scoop machine 1, which is composed of an inlet pipeline system, a condensation and liquid separation system, a purification system, an induced draft fan system, an outlet pipeline system and its supporting detection and control system. Under the action of the induced draft fan, the tail gas of the slag scoop machine 1 enters the condensation and liquid separation system through the inlet pipeline system, and the water contained in the tail gas is cooled and separated and then sent to the purification system. The purification system stores a purifier, which adsorbs toxic and flammable gases and then discharges them to a safe place at the top of the gasification device through the induced draft fan for venting.

[0078] In the above-mentioned tail gas purification process of the slag machine 1, the inlet pipe system is used to collect toxic and flammable gases volatilized from various parts of the slag machine 1. Multiple air suction ports are evenly arranged on both sides of the water tank, slag tank, lifting section, and head of the slag machine 1, and the equipment pipe ports are distributed as evenly as possible so that the tail gas from various parts of the slag machine 1 can be sucked into the purification system. Each branch pipe is connected to the equipment pipe port, and the branch pipe ports are merged into a main pipe and sent to the condensation and liquid separation system.

[0079] In a typical application process, multiple DN100 air suction ports are evenly arranged every 3 meters on both sides of the water bin, slag bin, lifting section and head part of the slag remover 1. The total pipe size of the air suction pipe of a single slag remover 1 is DN150, and the total pipe size of the branch pipes of the exhaust gas purification systems of the three slag removers 1 is DN300 after being combined.

[0080] In the above-mentioned tail gas purification process of the slag picker 1, the function of the condensation and liquid separation system is to condense the water vapor contained in the tail gas of the slag picker 1 and perform gas-liquid separation to prevent the water vapor from affecting the adsorption performance of the downstream purifier and extend the service life of the purifier. The condensation and liquid separation system is provided with a condenser 2 and a liquid separation tank 3. The condenser 2 is a shell and tube heat exchanger. The tail gas of the slag picker 1 is carried by the tube side. The material is thickened carbon steel or stainless steel. The shell side is the cooling medium, that is, circulating cooling water, and the material is thickened carbon steel. After the tail gas leaves the condenser 2, it is sent to the liquid separation tank 3. A swirl plate or a wire mesh demister is provided on the top of the liquid separation tank 3. After liquid separation, the tail gas is sent to the purification system, and the condensate returns to the slag picker 1.

[0081] In the above-mentioned tail gas purification process of the slag remover 1, the function of the purification system is to use a purifier to purify the toxic and combustible components in the tail gas. The purifier is stored in the purification tank. The purifier uses activated carbon or molecular sieve as a carrier and is loaded with a special catalytic aid, which is a room temperature fine desulfurizer. The principle of catalytic aid desulfurization is that the H2S in the tail gas of the slag remover 1 reacts with the O2 in the tail gas and the active components in the catalyst to generate sulfur element or sulfide, which is deposited in the gaps of the purifier. The purification system consists of a first purification tank 4 and a second purification tank 5, 1 in operation and 1 in standby, and the two are switched for use. The purifier has the advantages of large sulfur capacity, high desulfurization accuracy, high strength, and high air velocity. In a typical application process, the particle size of the purifier is Bulk density 600±60kg / m 3 , pore volume ≥ 0.6ml / g, strength ≥ 90%, desulfurization accuracy H2S ≤ 0.03mg / Nm 3 .

[0082] In the above-mentioned tail gas purification process of the slag scoop machine 1, the induced draft fan is the driving force of the entire system. Through its extraction function, the tail gas of the slag scoop machine 1 is extracted from the slag scoop machine 1 equipment and the resistance of the pipeline system and the purifier bed is overcome. The system is equipped with a first induced draft fan 6 and a second induced draft fan 7, one is in operation and the other is in standby, and the two are switched for use.

[0083] In the tail gas purification process of the above-mentioned slag loader 1, the outlet pipeline system is used to send the purified tail gas to a safe place at the top of the gasification device for venting. The outlet branch pipelines of the induced draft fan are gathered into a main pipe, and piped to a safe place at the top of the gasification device for venting. A rain cap is set at the venting port, and a shower is set at the low point of the pipeline. In the typical application process, the induced draft fan equipment pipe orifice size of the tail gas purification system of the three sets of slag loader 1 is DN300.

[0084] In the tail gas purification process of the above-mentioned slag remover 1, the function of the detection and control system is to detect the toxic gas content in the exhaust gas and to switch and control the backup system. The detection and control system consists of a toxic and combustible gas detector and cut-off valves before and after the purification tank and the induced draft fan. When the toxic and combustible gas detector set at the vent port alarms or the life of the purifier expires, the cut-off valve to the first purification tank inlet cut-off valve 10 and the first purification tank outlet cut-off valve 12 are closed, and the spare second purification tank inlet cut-off valve 9 and the second purification tank outlet cut-off valve 11 are opened, and the backup purification tank (second purification tank 5) is switched. When the first induced draft fan 6 fails, switch to the backup induced draft fan (second induced draft fan 7). The alarm value of the toxic and combustible gas detector at the vent port is set to H2S≤1.5mg / Nm 3 .

[0085] In the typical application process, the exhaust gas purification system of the three slag loader 1 has an induced draft fan air volume of 3000Nm 3 / h, the hydrogen sulfide content in the tail gas is 0.0003V%, and the purifier filling volume is about 8m 3 The sulfur capacity of conventional activated carbon is about 8wt%, and the service life of conventional activated carbon is about 3 months. The sulfur capacity of modified activated carbon loaded with active components can reach 16wt%, and the service life can be extended to about 6 months.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A slag removal machine tail gas purification process, characterized in that: The tail gas from the slag remover is drawn by the induced draft fan system and enters the condensation and liquid separation system through the inlet pipe system. The water contained in the tail gas is cooled and separated and then sent to the purification system. After the toxic and flammable gas is purified and tested to be qualified, it is discharged to the air through the induced draft fan.

2. A slag removal machine tail gas purification process according to claim 1, characterized in that: Several air suction ports are evenly arranged on the water tank, slag tank, lifting section and head of the slag scoop machine; Preferably, a plurality of air suction ports are evenly arranged every 2-3 meters on both sides of the water bin, slag bin, lifting section and head part of the slag remover.

3. A slag removal machine tail gas purification process according to claim 1, characterized in that: The purification system is provided with a purifier, which uses activated carbon or molecular sieve as a carrier and is loaded with a catalytic aid; Preferably, the catalyst aid is an iron-based or zinc-based room-temperature fine desulfurizer; The particle size of the purifier is φ3-5mm, and the bulk density is 600±60kg / m 3 , pore volume ≥ 0.6ml / g, strength ≥ 90%, desulfurization accuracy H2S ≤ 0.03mg / Nm 3 .

4. A slag removal machine tail gas purification process according to claim 1, characterized in that: The detection is carried out in the outlet piping system, which includes toxic and combustible gas detectors; The purification system includes at least two purification tanks, and the induced draft fan includes at least two induced draft fans; when the toxic and combustible gas detector arranged at the vent port alarms, the life of the purifier expires, the shut-off valve at the inlet and the shut-off valve at the outlet of the first purification tank are switched to the second purification tank, and when the first induced draft fan fails, it is switched to the second induced draft fan.

5. A device for use in a slag removal machine tail gas purification process, characterized in that: Including inlet piping system, condensation separation system, purification system, induced draft fan system, and outlet piping system; The inlet pipeline system is arranged above the slag remover; the inlet pipeline system is connected with the condensation separation system, the condensation separation system is connected with the purification system, the purification system is connected with the induced draft fan system, and the induced draft fan system is connected with the outlet pipeline system.

6. The device for using the tail gas purification process of a slag extractor according to claim 5 is characterized by: The inlet pipe system includes an air suction pipe and a connecting pipe, and a plurality of air suction pipes are connected to the connecting pipe, and the air suction pipe and the connecting pipe are arranged vertically; Several air suction ports are evenly arranged on the water tank, slag tank, lifting section and head of the slag scoop machine; Preferably, the air intake pipe is connected corresponding to the position of the air intake port.

7. The device for using the tail gas purification process of a slag extractor according to claim 5 is characterized by: The condensation and liquid separation system includes a condenser and a liquid separation tank; The inlet pipeline system is connected to the condenser through a pipeline, the condenser is connected to one side of the liquid separation tank through a pipeline, and the bottom of the liquid separation tank is connected to the slag scooping machine through a condensing pipe; The upper part of the separation tank is connected to the purification system through a pipeline.

8. The device for using the tail gas purification process of a slag extractor according to claim 5 is characterized by: The purification system includes at least two groups of purification components, and each group of purification components is connected in parallel; Preferably, each purification assembly includes a purification tank, a purification tank inlet cut-off valve, and a purification tank outlet cut-off valve; the purification tank inlet cut-off valve is connected to the condensate separation system through a pipeline; the purification tank outlet cut-off valve is connected to the induced draft fan system through a pipeline; Preferably, the purification system comprises a first purification component and a second purification component, and the first purification component and the second purification component are connected in parallel through a pipeline; The first purification assembly includes a first purification tank, a first purification tank inlet cut-off valve, and a first purification tank outlet cut-off valve; The first purification tank inlet cut-off valve and the first purification tank outlet cut-off valve are arranged on both sides of the first purification tank through pipelines, and the first purification tank inlet cut-off valve is connected to the condensate separation system through pipelines; the first purification tank outlet cut-off valve is connected to the induced draft fan system through pipelines; The second purification assembly includes a second purification tank, a second purification tank inlet cut-off valve, and a second purification tank outlet cut-off valve; The second purification tank inlet shut-off valve and the second purification tank outlet shut-off valve are arranged on both sides of the second purification tank through pipelines. The second purification tank inlet shut-off valve is connected to the condensation separation system through pipelines; the second purification tank outlet shut-off valve is connected to the induced draft fan system through pipelines.

9. The device for using the tail gas purification process of a slag extractor according to claim 5, characterized in that: The induced draft fan system includes at least two sets of induced draft fan assemblies; Preferably, each group of induced draft fan components is connected in parallel; Preferably, each set of induced draft fan components includes an induced draft fan inlet cut-off valve, an induced draft fan, and an induced draft fan outlet cut-off valve; Preferably, the induced draft fan inlet cut-off valve and the induced draft fan outlet cut-off valve are arranged on both sides of the induced draft fan through pipelines; Preferably, the induced draft fan system comprises a first induced draft fan assembly and a second induced draft fan assembly; The first induced draft fan assembly and the second induced draft fan assembly are connected in parallel through a pipeline, and one end of the first induced draft fan assembly and the second induced draft fan assembly are connected to the outlet pipeline system through the pipeline; The first induced draft fan assembly includes a first induced draft fan inlet cut-off valve, a first induced draft fan, and a first induced draft fan outlet cut-off valve; The first induced draft fan inlet cut-off valve and the first induced draft fan outlet cut-off valve are arranged on both sides of the first induced draft fan through pipelines; The second induced draft fan assembly includes a second induced draft fan inlet cut-off valve, a second induced draft fan, and a second induced draft fan outlet cut-off valve; the second induced draft fan inlet cut-off valve and the second induced draft fan outlet cut-off valve are arranged on both sides of the second induced draft fan through pipelines.

10. The device for using the tail gas purification process of a slag extractor according to claim 5, characterized in that: The outlet pipeline system includes an outlet pipe and a toxic and combustible gas detector. The outlet pipe is connected to the induced draft fan system, and the toxic and combustible gas detector is connected to one side of the outlet pipe.

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